Data transmission method and device, and terminal

ABSTRACT

The disclosure relates to a data transmission method and device, and a terminal. The method is applied to a terminal that establishes a communication connection with a correspondent node through a first link provided by a cellular network and a second link provided by a Wireless Local Area Network (WLAN), respectively. The method includes acquiring relevant information of the WLAN that is accessed by a home terminal, the relevant information of the WLAN being used to indicate a data distribution capability of the WLAN; determining an amount of data transmitted to the correspondent node by the second link based on the relevant information of the WLAN; and transmitting uplink data to the correspondent node through the second link based on the amount of the data transmitted to the correspondent node.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation application of, is based upon, andclaims priority to International Patent Application PCT/CN2016/087614,filed on Jun. 29, 2016, the entire contents of which are incorporatedherein by reference.

TECHNICAL FIELD

The present disclosure relates to the technical field of wirelesscommunication, and in particular to a data transmission method anddevice, and a terminal.

BACKGROUND

As the load of operators' cellular networks becomes increasinglyheavier, Wireless Local Area Networks (WLANs) receive more and moreattention of operators. The operator deploys an operator-level WLAN as ahot supplement of the cellular network to help the cellular networkperform flow division, such that the pressure of rapid flow growth ofthe cellular network is relieved, thus improving the user experience.

The LTE-WLAN Aggregations (LWA) technology can ensure deep integrationbetween a Long Term Evolution (LTE) network and the WLAN on a wirelessside to balance their dynamic loads. The LWA technology mainly refers tothe dual-link technology. That is, all data from a core network may befirst transmitted to an evolved NodeB (eNB) in the LTE network. The eNBmay determine which data are transmitted to User Equipment (UE) throughthe LTE network and which data are transmitted to the UE through theWLAN in accordance with a series of measurement results,pre-configurations, etc.

At present, no relevant solution has been proposed for an uplinktransmission process.

SUMMARY

This Summary is provided to introduce a selection of aspects of thepresent disclosure in a simplified form that are further described belowin the Detailed Description. This Summary is not intended to identifykey features or essential features of the claimed subject matter, nor isit intended to be used to limit the scope of the claimed subject matter.

Aspects of the disclosure provide a method of data transmission, appliedto a terminal that establishes a communication connection with acorrespondent node through a first link provided by a cellular networkand a second link provided by a Wireless Local Area Network (WLAN),respectively. The method includes acquiring relevant information of theWLAN that is accessed by a home terminal, the relevant information ofthe WLAN being used to indicate a data distribution capability of theWLAN; determining an amount of data transmitted to the correspondentnode by the second link based on the relevant information of the WLAN;and transmitting uplink data to the correspondent node through thesecond link based on the amount of the data transmitted to thecorrespondent node.

In an example, the relevant information of the WLAN includes at leastone of a version number of the WLAN, a Received Signal StrengthIndication (RSSI) of the WLAN, an available channel utilization of theWLAN, a Basic Service Set (BS S) load of the WLAN, and/or a number ofstations (STA) accessed in the WLAN.

According to an aspect, when determining the amount of the datatransmitted to the correspondent node, the method includes acquiring acurrent amount of data in an uplink buffer that is configured to storethe uplink data; and determining the amount of the data transmitted tothe correspondent node by the second link based on the relevantinformation of the WLAN and the current amount of data.

According to another aspect, the method further includes sending aBuffer Status Report (BSR) to a base station in the cellular network,wherein the BSR includes a difference value between the current amountof data and the amount of the data transmitted by the second link, andwherein the base station is configured to allocate an uplink resourcefor the terminal based on the difference value; and acquiring the uplinkresource allocated by the base station.

According to yet another aspect, the method further includes acquiring anetwork status; and adjusting an amount of data transmitted by one ofthe first link and the second link based on the network status.

In an example, the network status includes at least one of a linkquality of the first link, a link quality of the second link, a loadcondition of the cellular network, and/or a load condition of the WLAN.

Aspects of the disclosure also provide a terminal that establishes acommunication connection with a correspondent node through a first linkprovided by a cellular network and a second link provided by a WirelessLocal Area Network (WLAN), respectively. The terminal includes aprocessor and a memory for storing instructions executable by theprocessor. The processor is configured to acquire relevant informationof the WLAN that is accessed by a home terminal, the relevantinformation of the WLAN is used to indicate a data distributioncapability of the WLAN; determine an amount of data transmitted to thecorrespondent node by the second link based on the relevant informationof the WLAN; and transmit uplink data to the correspondent node throughthe second link based on the amount of the data transmitted to thecorrespondent node.

Aspects of the disclosure also provide a non-transitorycomputer-readable medium storing instructions that, when executed by oneor more processors of a device that establishes a communicationconnection with a correspondent node through a first link provided by acellular network and a second link provided by a Wireless Local AreaNetwork (WLAN), respectively, cause the device to acquire relevantinformation of the WLAN which is accessed by a home terminal, therelevant information of the WLAN being used to indicate a datadistribution capability of the WLAN; determine an amount of datatransmitted to the correspondent node by the second link based on therelevant information of the WLAN; and transmit uplink data to thecorrespondent node through the second link based on the amount of thedata transmitted to the correspondent node.

It is to be understood that both the foregoing general description andthe following detailed description are illustrative and explanatory onlyand are not restrictive of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute apart of this specification, illustrate aspects consistent with thedisclosure and, together with the description, serve to explain theprinciples of the disclosure.

FIG. 1 is a schematic view of a network architecture according to anexemplary aspect of the present disclosure;

FIG. 2 is a flowchart of a data transmission method according to anexemplary aspect of the present disclosure;

FIG. 3 is a flowchart of a data transmission method according to anotherexemplary aspect of the present disclosure;

FIG. 4 is a block diagram of a data transmission device according to anexemplary aspect of the present disclosure;

FIG. 5 is a block diagram of a data transmission device according toanother exemplary aspect of the present disclosure; and

FIG. 6 is simplified schematic view of a terminal according to anexemplary aspect of the present disclosure.

The specific aspects of the present disclosure, which have beenillustrated by the accompanying drawings described above, will bedescribed in detail below. These accompanying drawings and descriptionare not intended to limit the scope of the present disclosure in anymanner, but to explain the concept of the present disclosure to thoseskilled in the art via referencing specific aspects.

DETAILED DESCRIPTION

Reference will now be made in detail to exemplary aspects, examples ofwhich are illustrated in the accompanying drawings. The followingdescription refers to the accompanying drawings in which the samenumbers in different drawings represent the same or similar elementsunless otherwise represented. The implementations set forth in thefollowing description of illustrative aspects do not represent allimplementations consistent with the disclosure. Instead, they are merelyexamples of apparatuses and methods consistent with aspects related tothe disclosure as recited in the appended claims.

FIG. 1 is a schematic view of a network architecture according to anexemplary aspect. The network architecture includes a terminal 10, acellular network 20 and a WLAN 30.

The cellular network 20 is also referred to as a mobile network, andusually includes a core network and an access network. Several corenetwork devices 22, such as a Mobility Management Entity (MME) and aService Gateway (S-GW), are deployed in the core network. Several basestations 21 are deployed in the access network. The base station 21 andthe terminal 10 communicate with each other through a certain airinterface technology, for example, a cellular technology. In an LTEsystem, the base station 21 and the terminal 10 communicate with eachother through a Uu interface. The technical solution described in theaspects of the present disclosure may be applicable to the LTE system orother wireless communication systems adopting various wireless accesstechnologies, for example, systems adopting CDMA (Code Division MultipleAccess), FDMA (Frequency Division Multiple Access), TDMA (Time DivisionMultiple Access), OFDMA (Orthogonal Frequency Division Multiple Access),SC-FDMA (Single Carrier Frequency Division Multiple Access), etc.Besides, the technical solution may also be applicable to a follow-upevolution system of the LTE system, for example, a 5G (5th Generation)system. To make it clear, only the LTE system is taken as an example forexplanation. In the LTE system, an E-UTRAN (Evolved UniversalTerrestrial Radio Access Network) serves as the wireless access network,and an EPC (Evolved Packet Core) serves as the core network.

The WLAN 30 includes a plurality of Access Points (AP) 31. The AP 31 isalso referred to as wireless access points or hot spots and used for theterminal 10 to access the WLAN 30. The AP 31 and the terminal 10communicate with each other through a wireless network, for example, aWi-Fi (Wireless Fidelity) network.

In a scenario that the cellular network 20 and the WLAN 30 areaggregated, the terminal 10 establishes a communication connection witha correspondent node through a first link provided by the cellularnetwork 20 and a second link provided by the WLAN 30. As shown in FIG.1, the first link is a communication link for direct connection betweenthe terminal 10 and the base station 21. The second link is acommunication link established between the terminal 10 and the basestation 21 through the AP 31.

Taking the cellular network 20 as an LTE network for example, in ascenario of an LWA, the LTE network may be aggregated with the WLAN 30by means of colocation fusion. The AP 31 in the WLAN 30 may beintegrated with an eNB in the LTE network. Alternatively, the LTEnetwork may be aggregated with the WLAN 30 by means of non-colocationfusion. The AP 31 in the WLAN 30 may be connected to the eNB in the LTEnetwork through an Xw interface.

For a downlink transmission process, after receiving a data packettransmitted from the core network, the base station 21 in the cellularnetwork 20 may draw many factors into consideration, such as a currentload condition of the base station 21, a load condition of the AP 31 inthe connected WLAN 30, and a link condition between the terminal 10 andthe AP 31 in the WLAN 30, etc. to dynamically determine whether certaindata packets or certain services are transmitted to the terminal 10 bythe cellular network or by the WLAN 30. If the base station 21 decidesto transmit certain data packets from the WLAN to the terminal 10, thesedata packets can be dynamically distributed through a PDCP (Packet DataConvergence Protocol) layer. The data packets of the cellular network 20are adapted and packaged by a newly added adaptation layer or adaptationfunction and then sent to the AP 31 in the connected WLAN 30, and thenis sent by the AP 31 in the WLAN 30 to the corresponding terminal 10.After receiving the data packets distributed by the WLAN 30, theterminal 10 may merge them with the data packet received by the cellularnetwork 20 at the PDCP layer. Then, the merged data packets aretransmitted to an upper level. Referring to introductions andexplanations in the method aspect of the present disclosure for thedetail of an uplink transmission process.

In the aspect of the present disclosure, the terms “network” and“system” are often alternatively used, but their connotations may beunderstood by those skilled in the art. The terminal involved in theaspects of the present disclosure may include various hand-held devices,vehicle-mounted devices, wearable devices and computer devices, having awireless communication function, or other processing devices connectedto a wireless modem, as well as UE (User Equipment), an MS (MobileStation), a terminal device, etc. in various formats. For theconvenience of description, all the above-mentioned devices arecollectively referred to as terminals. The BS (Base Station) involved inthe aspect of the present disclosure is a device, which is deployed inthe wireless access network and configured to provide a wirelesscommunication function for the terminal. The base station may include amacro base station, a micro base station, a relay station, an accesspoint, etc. In systems adopting different wireless access technologies,devices with the functions of the base stations may have differentnames. For example, the device with the function of the base station isreferred to as an evolved Node B (eNB or eNodeB) in the LTE system, andreferred to as a node B in a 3G communication system. For theconvenience of description, the devices for providing the wirelesscommunication function for the terminal are collectively referred to asbase stations or BS.

FIG. 2 is a flowchart of a data transmission method according to anexemplary aspect. The method may be applied to a terminal in theimplementing environment of FIG. 1. The terminal establishes acommunication connection with a correspondent node through a first linkprovided by a cellular network and a second link provided by the WLAN.The method may include the following steps.

In step 201, relevant information of the WLAN accessed by a hometerminal is acquired, and the relevant information of the WLAN is usedto indicate a data distribution capability of the WLAN.

In step 202, the amount of data transmitted to the correspondent node bythe second link is determined in accordance with the relevantinformation of the WLAN.

In step 203, uplink data is transmitted to the correspondent nodethrough the second link in accordance with the amount of data.

To sum up, the data transmission method provided by the aspect acquiresthe relevant information of the WLAN which is accessed by the hometerminal, determines the amount of data transmitted to the correspondentnode by the second link provided by the WLAN in accordance with therelevant information of the WLAN, and transmits the uplink data to thecorrespondent node through the second link in accordance with thedetermined amount of data. An uplink transmission solution in the LWAtechnology is provided. The sizes of data transmitted on the first linkprovided by the cellular network and the second link provided by theWLAN are determined based on the relevant information of the WLAN. Thus,distributing transmission of the uplink data is realized. The datatransmission pressure of the cellular network is reduced. The allocationreasonability of the amount of the data transmitted on the two links areguaranteed.

FIG. 3 is a flow chart of a data transmission method according toanother exemplary aspect. The method may be applied to a terminal in animplementation environment illustrated in FIG. 1. The terminalestablishes a communication connection with a correspondent node througha first link provided by a cellular network and a second link providedby a WLAN respectively. The method may include the following steps.

In step 301, the relevant information of the WLAN accessed by a hometerminal is acquired.

The terminal acquires the relevant information of the WLAN accessed bythe home terminal. The relevant information of the WLAN is used toindicate a data distribution capability of the WLAN. Herein, the datadistribution capability of the WLAN may be measured from the perspectiveof the version, load condition, link quality and the like of the WLAN.

Optionally, the relevant information of the WLAN includes but notlimited to at least one of a version number of the WLAN, a ReceivedSignal Strength Indication RSSI of the WLAN, an available channelutilization of the WLAN, a Basic Service Set BSS load of the WLAN andthe number of stations STA accessed in the WLAN. Herein, RSSI of theWLAN means RSSI between the terminal and an AP connected thereto. Forexample, the terminal may measure the strength of a received signal thatis sent by the AP connected to the terminal to obtain the RSSI value.The available channel utilization of the WLAN means the utilizationratio of an available channel in the second link. The BSS load of theWLAN means a load condition of the BSS (namely, the BSS to which the APconnected to the terminal belongs) to which the terminal belongs. Thenumber of the STAs accessed in the WLAN means the number of the STAsconnected to the AP that is connected to the terminal.

In step 302, the amount of data transmitted to the correspondent node bythe second link is determined in accordance with the relevantinformation of the WLAN.

The terminal determines the amount of the data transmitted to thecorrespondent node by the second link in accordance with the relevantinformation of the WLAN. The amount of data may be a specific valuewhich means a ratio of the amount of the data transmitted to thecorrespondent node by the second link to the total amount of data thatis required to be transmitted to the correspondent node. Alternatively,the amount of data may be a value which indicates the number (unit:piece) of data packets or the data size (unit: bit).

In an example, when the amount of data is the value which indicates thenumber of the data packets or the data size, step 302 may include thefollowing sub-steps:

1. acquiring the current amount of data in an uplink buffer that isconfigured to store uplink data; and

2. determining the amount of the data transmitted to the correspondentnode by the second link in accordance with the relevant information ofthe WLAN and the current amount of data.

The uplink buffer is a data buffer for storing the uplink data. Takingan LWA scenario as an example, since flow distribution is performedthrough a PDCP layer, the uplink buffer is a PDCP buffer. For example,the current number of the data packets in the uplink buffer is n, theterminal determines that the number of data packets transmitted to thecorrespondent node by the second link is m in accordance with therelevant information of the WLAN and the number n of the data packets,where n≥m≥1, and n and m are integers. For another example, the currentamount of data in the uplink buffer is a bit, the terminal determinesthat the amount of the data transmitted to the correspondent node by thesecond link is b bit in accordance with the relevant information of theWLAN and the amount of data, where a≥b≥1, and a and b are integers. Inconsideration that different data packets may contain different datasizes, the amount of data may be represented more accurately by the datasize (number of bits).

Optionally, after determining the amount of the data transmitted to thecorrespondent node by the second link, the terminal sends a BSR (BufferStatus Report) to the base station in the cellular network. Herein, theBSR includes a difference value between the current amount of data inthe upper buffer and the amount of data transmitted by the second link.The base station is configured to allocate an uplink resource for theterminal in accordance with the difference value. The terminal acquiresthe uplink resource allocated by the base station. In the aspects of thepresent disclosure, by carrying the difference value in the BSR insteadof carrying the current amount of data in the uplink buffer, since thedifference value reflects more accurately the amount of data which areplanned to be transmitted to the correspondent node by the first linkprovided by the cellular network, the base station may allocate theuplink resource more accurately in accordance with the difference value.Thus, the base station is prevented from allocating excessive uplinkresources for UE. Accordingly, waste of the resources is avoided.

Besides, the aspects of the present disclosure do not limit a specificmode in which the terminal determines the amount of the data transmittedto the correspondent node by the second link in accordance with therelevant information of the WLAN. In an example, when the relevantinformation of the WLAN only includes one piece of information, theterminal determines the amount of the data transmitted by the secondlink in accordance with the piece of information. For example, theproportion of the amount of the data transmitted by the second link tothe total amount of data is calculated and inquired in accordance withthe piece of information. After that, the amount of the data transmittedby the second link is worked out in accordance with the current amountof data in the uplink buffer and the proportion. When the relevantinformation of the WLAN includes multiple pieces of information, theterminal may determine the amount of the data transmitted by the secondlink with reference to the multiple pieces of information. For example,different information items are configured with different weights. Theproportion of the amount of the data transmitted by the second link tothe total amount of data is calculated and determined in accordance withthe pieces of information and the corresponding weights. After that, theamount of the data transmitted by the second link is worked out inaccordance with the current amount of data in the uplink buffer and theproportion.

In step 303, uplink data is transmitted to the correspondent nodethrough the second link in accordance with the amount of data.

The terminal transmits the uplink data to the correspondent node throughthe second link in accordance with the amount of the data. For example,when the current amount of data in the uplink buffer is a bit, and theamount of data transmitted to the correspondent node by the second linkis determined by the terminal to be b bit, the terminal transmits the bbit of uplink data to the correspondent node through the second link andtransmits the a-b bit of uplink data to the correspondent node throughthe first link.

In addition, in an uplink transmission process, the terminal mayperiodically execute the steps 301-303 to continuously adjust the amountof data transmitted to the correspondent node by the first link and thesecond link respectively.

Optionally, the data transmission method provided by the aspect furtherincludes the following steps 304-305.

In step 304, a network status is acquired.

The terminal acquires the network status which includes but not limitedto at least one of link quality of the first link, link quality of thesecond link, a load condition of the cellular network and a loadcondition of the WLAN. The load condition of the cellular network may bean overall load condition of the cellular network which is accessed bythe terminal, and may also be a load condition of the base stationconnected to the terminal. The load condition of the WLAN may be anoverall load condition of the WLAN which is accessed by the terminal,and may also to a load condition of the AP connected to the terminal.

In step 305, the amount of data transmitted by the first link or thesecond link is adjusted in accordance with the network status.

The terminal adjusts the amount of data transmitted by the first link orthe amount of data transmitted by the second link in accordance with thenetwork status. In the aspect of the present disclosure, the specificadjustment mode is not limited. For example, when the link quality ofthe first link is improved, and/or the link quality of the second linkis reduced, and/or the load condition of the cellular network ismitigated, and/or the load condition of the WLAN is increased, theterminal increases the amount of data transmitted by the first link andreduces the amount of data transmitted by the second link. On thecontrary, when the link quality of the first link is reduced, and/or thelink quality of the second link is improved, and/or the load conditionof the cellular network is increased, and/or the load condition of theWLAN is mitigated, the terminal reduces the amount of data transmittedby the first link and increases the amount of data transmitted by thesecond link.

To sum up, the data transmission method provided by the aspect acquiresthe relevant information of the WLAN which is accessed by the hometerminal, determines the amount of data transmitted to the correspondentnode by the second link provided by the WLAN in accordance with therelevant information of the WLAN, and transmits the uplink data to thecorrespondent node through the second link in accordance with thedetermined amount of data. An uplink transmission solution in the LWAtechnology is provided. The sizes of data transmitted on the first linkprovided by the cellular network and the second link provided by theWLAN are determined based on the relevant information of the WLAN. Thus,distributing transmission of the uplink data is realized. The datatransmission pressure of the cellular network is reduced. The allocationreasonability of the amount of the data transmitted on the two links areguaranteed.

In addition, the BSR is further sent to the base station in the cellularnetwork by the terminal, and includes the difference value between thecurrent amount of data in the uplink buffer and the amount of datatransmitted by the second link, such that the base station allocates anuplink resource for the terminal in accordance with the differencevalue. Since the difference value more accurately reflects the amount ofdata which are planned to be transmitted to the correspondent node bythe first link provided by the cellular network, the base station mayallocate the uplink resource more accurately in accordance with thedifferent value. Thus, the base station is prevented from allocatingexcessive uplink resources for UE. Accordingly, waste of the resource isavoided.

In addition, the network status is acquired through the terminal. Theamount of data transmitted by the first link or the second link isdynamically adjusted in accordance with the network status to maximizethe resource utilization ratio and to improve the system performance.

The aspects of the present disclosure provide an uplink transmissionsolution in a cellular network and WLAN aggregation scenario.Optionally, when the cellular network is an LTE network, an aggregationarchitecture adopting the uplink transmission solution provided by theaspects of the present disclosure may be referred to as eLWA (enhancedLTE-WLAN Aggregations). By adoption of the technical solution providedin the aspects of the present disclosure, distributing transmission ofthe uplink data is realized. The data transmission pressure of thecellular network is reduced.

The followings are the device aspects of the present disclosure, whichmay be used to implement the method aspects of the present disclosure.For details which are not disclosed in the device aspects of the presentdisclosure, reference may be made to the method aspects of the presentdisclosure.

FIG. 4 is a block diagram of a data transmission device according to anexemplary aspect. The device may be applied to the terminal in theimplementing environment of FIG. 1. The terminal establishes acommunication connection with a correspondent node through a first linkprovided by a cellular network and a second link provided by a WLANrespectively. The device has the function of implementing the abovemethods and the function can be implemented through hardware or throughsoftware executed by relevant hardware. The device may include: a firstacquisition module 410, a determination module 420 and a transmit module430.

The first acquisition module 410 is configured to acquire relevantinformation of the WLAN which is accessed by a home terminal, and therelevant information of the WLAN is used to indicate a data distributioncapability of the WLAN.

The determination module 420 is configured to determine the amount ofdata transmitted to the correspondent node by the second link inaccordance with the relevant information of the WLAN.

The transmit module 430 is configured to transmit uplink data to thecorrespondent node through the second link in accordance with the amountof data.

To sum up, the data transmission device provided by the aspect acquiresthe relevant information of the WLAN which is accessed by the hometerminal, determines the amount of data transmitted to the correspondentnode by the second link provided by the WLAN in accordance with therelevant information of the WLAN, and transmits the uplink data to thecorrespondent node through the second link in accordance with thedetermined amount of data. An uplink transmission solution in the LWAtechnology is provided. The sizes of data transmitted on the first linkprovided by the cellular network and the second link provided by theWLAN are determined based on the relevant information of the WLAN. Thus,distributing transmission of the uplink data is realized. The datatransmission pressure of the cellular network is reduced. The allocationreasonability of the amount of the data transmitted on the two links areguaranteed.

In an alternative aspect provided based on the aspect shown in FIG. 4,the relevant information of the WLAN comprises at least one of at leastone of a version number of the WLAN, a Received Signal StrengthIndication RSSI of the WLAN, an available channel utilization of theWLAN, a Basic Service Set BSS load of the WLAN and the number ofstations STA accessed in the WLAN.

In another alternative aspect provided based on the aspect shown in FIG.4, as shown in FIG. 5, the determination module 420 includes: a firstacquisition sub-module 420 a and a determination sub-module 420 b.

The first acquisition sub-module 420 a is configured to acquire acurrent amount of data in the uplink buffer that is configured to storethe uplink data.

The determination sub-module 420 b is configured to determine the amountof the data transmitted to the correspondent node by the second link inaccordance with the relevant information of the WLAN and the currentamount of data.

Optionally, the determination module 420 further includes: a sendingsub-module 420 c and a second acquisition sub-module 420 d.

The sending sub-module 420 c is configured to send a BSR to a basestation in the cellular network, the BSR comprises a difference valuebetween the current amount of data and the amount of the datatransmitted by the second link, and the base station is configured toallocate an uplink resource for the terminal in accordance with thedifference value.

The second acquisition sub-module 420 d is configured to acquire theuplink resource allocated by the base station.

In a yet another alternative aspect provided based on the aspect shownin FIG. 4, as shown in FIG. 5, the device further includes: a secondacquisition module 440 and an adjusting module 450.

The second acquisition module 440 is configured to acquire a networkstatus.

The adjusting module 450 is configured to adjust the amount of datatransmitted by the first link or the second link in accordance with thenetwork status.

Optionally, the network status comprises at least one of the linkquality of the first link, the link quality of the second link, the loadcondition of the cellular network and the load condition of the WLAN.

It should be noted that the device provided by the above aspect isexemplified only by the division of the above respective functionalmodules when implementing its function. In practical application, theabove-described functions may be assigned and completed by differentfunctional modules in accordance with requirements, such that theinternal structure of the device can be divided into differentfunctional modules to complete all or part of the functions describedabove.

With respect to the device of the above aspect, the specific mode ofoperation performed by each module has been described in details in theaspect of the method, and the description thereof may not be describedin details herein.

An exemplary aspect of the present disclosure further provides aterminal which is capable of implementing the data transmission methodprovided in the aspects of the present disclosure. The terminal mayinclude: a processor and a memory for storing instructions executable bythe processor. Herein, the processor is configured to:

acquire relevant information of the WLAN which is accessed by a hometerminal, and the relevant information of the WLAN is used to indicate adata distribution capability of the WLAN;

determine the amount of data transmitted to the correspondent node bythe second link in accordance with the relevant information of the WLAN;and

transmit uplink data to the correspondent node through the second linkin accordance with the amount of data.

Optionally, the relevant information of the WLAN comprises at least oneof a version number of the WLAN, a Received Signal Strength IndicationRSSI of the WLAN, an available channel utilization of the WLAN, a BasicService Set BSS load of the WLAN and the number of stations STA accessedin the WLAN.

Optionally, the processor is configured to:

acquire a current amount of data in an uplink buffer that is configuredto store the uplink data; and

determine the amount of the data transmitted to the correspondent nodeby the second link in accordance with the relevant information of theWLAN and the current amount of data.

Optionally, the processor is configured to:

send a Buffer Status Report (BSR) to a base station in the cellularnetwork, wherein the BSR comprises a difference value between thecurrent amount of data and the amount of the data transmitted by thesecond link, and the base station is configured to allocate an uplinkresource for the terminal in accordance with the difference value; and

acquire the uplink resource allocated by the base station.

Optionally, the processor is further configured to:

acquire a network status; and

adjust the amount of data transmitted by the first link or the secondlink in accordance with the network status.

Optionally, the network status comprises at least one of the linkquality of the first link, the link quality of the second link, the loadcondition of the cellular network and the load condition of the WLAN.

FIG. 6 is a simplified schematic view of a possible design structure ofa terminal according to an exemplary aspect. The terminal 600 includes atransmitter 601, a receiver 602 and a processor 603. The processor 603may also be a controller, and is indicated as “controller/processor 603”in FIG. 6. Optionally, the terminal 600 may further include amodulation-demodulation processor 605. The modulation-demodulationprocessor 605 may include an encoder 606, a modulator 607, a decoder 608and a demodulator 609.

In an example, the transmitter 601 adjusts (such as analog converts,filters, amplifies and up converts) the output samples and generates anuplink signal that is transmitted to the base station in theabove-mentioned aspect through an antenna. On a downlink, the antennareceives the downlink signal transmitted by the base station in theabove-mentioned aspect. The receiver 602 adjusts (such as filters,amplifies, down converts and digitizes) the signals received from theantenna and provides input samples. In the modulation-demodulationprocessor 605, the encoder 606 receives business data and a signalingmessage which are to be sent on the uplink, and processes (such asformats, encodes and interleaves) the business data and the signalingmessage. The modulator 607 further processes (such as symbol maps andmodulates) the encoded business data and signaling message and providesoutput samples. The demodulator 609 processes (such as demodulates) theinput samples and provides symbol estimation. The decoder 608 processes(such as de-interleaves and decodes) the symbol estimation and providesthe decoded data and signaling message which are sent to the terminal600. The encoder 606, the modulator 607, the demodulator 609 and thedecoder 608 may be implemented by the synthesizedmodulation-demodulation processor 605. These units perform processing inaccordance with the wireless access technology (such as LTE and otheraccess technologies of an evolution system). It should be noted thatwhen the terminal 600 does not include the modulation-demodulationprocessor 605, the above functions of the modulation-demodulationprocessor 605 may also be completed by the processor 603.

The processor 603 performs control management on actions of the terminal600 and is configured to execute the processes performed by the terminal600 in the aspects of the present disclosure. For example, the processor603 is further configured to execute the step processes in FIG. 2 andFIG. 3, and/or other step processes of the technical solution describedby the present disclosure.

Further, the terminal 600 may further include a memory 604 configured tostore a program code and data for the terminal 600.

The processor configured to execute the functions of the terminal in theaspects of the present disclosure may be a Central Processing Unit(CPU), a general-purpose processor, a Digital Signal Processor (DSP), anApplication-Specific Integrated Circuit (ASIC), an Field ProgrammableGate Array (FPGA), or other programmable logic devices, transistor logicdevices, hardware components or any combinations thereof. The processormay realize or execute various exemplary logic boxes, modules andcircuits, which are described with reference to the aspects of thepresent disclosure. The processor may also be a combination forachieving calculation, such as a combination including one or moremicroprocessors and a combination of DSP and microprocessor.

The steps of the method or algorithm described with reference to theaspects of the present disclosure may be realized by means of hardwareor in the way that the processor executes a software instruction. Thesoftware instruction may consist of a corresponding software module thatmay be stored in a Random Access Memory (RAM), a flash memory, a ReadOnly Memory (ROM), an Erasable Programmable ROM (EPROM), an ElectricallyEPROM (EEPROM), a register, a hard disk, a mobile hard disk, a CD-ROM orstorage medium in any other formats well known in the art. An exemplarystorage medium is coupled with the processor, such that the processormay read information from the storage medium and write information intothe storage medium. Certainly, the storage medium may also be part ofthe processor. The processor and the storage medium may be located inthe ASIC. In addition, the ASIC may be located in the terminal.Certainly, the processor and the storage medium may also exist asdiscrete components in the terminal.

The aspects of the present disclosure further provide a computer storagemedium for storing the computer software instruction used by theterminal. The computer storage medium contains a program that isdesigned for executing the above-mentioned method.

Those skilled in the art should appreciate that in one or more of theabove examples, the functions described in the aspects of the presentdisclosure may be implemented by hardware, software, firmware, or anycombinations thereof. When implemented by software, the functions may bestored in a computer readable medium or transmitted as one or moreinstructions or codes on the computer readable medium. The computerreadable medium includes a computer storage medium and a communicationmedium including any medium that facilitates transfer of a computerprogram from one location to another. The storage medium may be anyavailable medium that can be accessed by a general-purpose orspecial-purpose computer.

It is noted that the various modules, sub-modules, units, and componentsin the present disclosure can be implemented using any suitabletechnology. For example, a module may be implemented using circuitry,such as an integrated circuit (IC). As another example, a module may beimplemented as a processing circuit executing software instructions.

It should be understood that “a plurality” as referred to herein meanstwo or more. “And/or” describes an association relationship betweenassociated objects and indicates that there may be three relationships.For example, A and/or B may indicate that there are three cases where Aexists separately, A and B exist at the same time, and B existsseparately. The character “I” generally indicates that an “or”relationship exists between contextual objects.

The specific implementations described above have further explained theobjectives, technical solutions and beneficial effects of the aspects ofthe present disclosure. It should be understood that the abovedescription is only the specific implementations of the aspects of thepresent disclosure and is not intended to limit the scope of protectionof the aspects of the present disclosure. Any modifications, equivalentsubstitutions, improvements, etc., which are made based on the technicalsolutions of the aspects of the present disclosure, should fall withinthe scope of protection of the aspects of the present disclosure.

Other aspects of the disclosure will be apparent to those skilled in theart from consideration of the specification and practice of thedisclosure disclosed here. This application is intended to cover anyvariations, uses, or adaptations of the disclosure following the generalprinciples thereof and including such departures from the presentdisclosure as come within known or customary practice in the art. It isintended that the specification and examples be considered asillustrative only, with a true scope and spirit of the disclosure beingindicated by the following claims.

It will be appreciated that the present disclosure is not limited to theexact construction that has been described above and illustrated in theaccompanying drawings, and that various modifications and changes can bemade without departing from the scope thereof. It is intended that thescope of the disclosure only be limited by the appended claims.

What is claimed is:
 1. A method of data transmission, applied to aterminal that establishes a communication connection with acorrespondent node through a first link provided by a cellular networkand a second link provided by a Wireless Local Area Network (WLAN),respectively, the method comprising: acquiring relevant information ofthe WLAN that is accessed by a home terminal, the relevant informationof the WLAN being used to indicate a data distribution capability of theWLAN; determining an amount of data transmitted to the correspondentnode by the second link based on the relevant information of the WLAN;and transmitting uplink data to the correspondent node through thesecond link based on the amount of the data transmitted to thecorrespondent node.
 2. The method according to claim 1, wherein therelevant information of the WLAN comprises at least one of a versionnumber of the WLAN, a Received Signal Strength Indication (RSSI) of theWLAN, an available channel utilization of the WLAN, a Basic Service Set(BSS) load of the WLAN, and/or a number of stations (STA) accessed inthe WLAN.
 3. The method according to claim 1, wherein determining theamount of the data transmitted to the correspondent node comprises:acquiring a current amount of data in an uplink buffer that isconfigured to store the uplink data; and determining the amount of thedata transmitted to the correspondent node by the second link based onthe relevant information of the WLAN and the current amount of data. 4.The method according to claim 3, further comprising: sending a BufferStatus Report (BSR) to a base station in the cellular network, whereinthe BSR comprises a difference value between the current amount of dataand the amount of the data transmitted by the second link, and whereinthe base station is configured to allocate an uplink resource for theterminal based on the difference value; and acquiring the uplinkresource allocated by the base station.
 5. The method according to claim1, further comprising: acquiring a network status; and adjusting anamount of data transmitted by one of the first link and the second linkbased on the network status.
 6. The method according to claim 5, whereinthe network status comprises at least one of a link quality of the firstlink, a link quality of the second link, a load condition of thecellular network, and/or a load condition of the WLAN.
 7. A terminalthat establishes a communication connection with a correspondent nodethrough a first link provided by a cellular network and a second linkprovided by a Wireless Local Area Network (WLAN), respectively, theterminal comprising: a processor; and a memory for storing instructionsexecutable by the processor, wherein the processor is configured to:acquire relevant information of the WLAN that is accessed by a hometerminal, the relevant information of the WLAN is used to indicate adata distribution capability of the WLAN; determine an amount of datatransmitted to the correspondent node by the second link based on therelevant information of the WLAN; and transmit uplink data to thecorrespondent node through the second link based on the amount of thedata transmitted to the correspondent node.
 8. The terminal according toclaim 7, wherein the relevant information of the WLAN comprises at leastone of a version number of the WLAN, a Received Signal StrengthIndication (RSSI) of the WLAN, an available channel utilization of theWLAN, a Basic Service Set (BSS) load of the WLAN, and/or a number ofstations STA accessed in the WLAN.
 9. The terminal according to claim 7,wherein the processor is further configured to: acquire a current amountof data in an uplink buffer that is configured to store the uplink data;and determine the amount of the data transmitted to the correspondentnode by the second link based on the relevant information of the WLANand the current amount of data.
 10. The terminal according to claim 9,wherein the processor is further configured to: send a Buffer StatusReport (BSR) to a base station in the cellular network, wherein the BSRcomprises a difference value between the current amount of data and theamount of the data transmitted by the second link, and wherein the basestation is configured to allocate an uplink resource for the terminalbased on the difference value; and acquire the uplink resource allocatedby the base station.
 11. The terminal according to claim 7, wherein theprocessor is further configured to: acquire a network status; and adjustan amount of data transmitted by one of the first link and the secondlink based on the network status.
 12. The terminal according to claim 8,wherein the processor is further configured to: acquire a networkstatus; and adjust an amount of data transmitted by one of the firstlink and the second link based on the network status.
 13. The terminalaccording to claim 11, wherein the network status comprises at least oneof a link quality of the first link, a link quality of the second link,a load condition of the cellular network, and/or a load condition of theWLAN.
 14. A non-transitory computer-readable medium storing instructionsthat, when executed by one or more processors of a device thatestablishes a communication connection with a correspondent node througha first link provided by a cellular network and a second link providedby a Wireless Local Area Network (WLAN), respectively, cause the deviceto: acquire relevant information of the WLAN which is accessed by a hometerminal, the relevant information of the WLAN being used to indicate adata distribution capability of the WLAN; determine an amount of datatransmitted to the correspondent node by the second link based on therelevant information of the WLAN; and transmit uplink data to thecorrespondent node through the second link based on the amount of thedata transmitted to the correspondent node.